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[![Build Status](https://travis-ci.org/gcalderone/Gnuplot.jl.svg?branch=master)](https://travis-ci.org/gcalderone/Gnuplot.jl)
[![License](http://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat)](LICENSE.md)
[![DocumentationStatus](https://img.shields.io/badge/docs-latest-blue.svg?style=flat)](https://gcalderone.github.io/Gnuplot.jl/dev/)
![Examples](https://img.shields.io/website?up_message=examples&url=https%3A%2F%2Flazarusa.github.io%2Fgnuplot-examples%2F)
**Gnuplot.jl** is a simple package able to send both data and commands from Julia to an underlying [gnuplot](http://gnuplot.sourceforge.net/) process. Its main purpose it to provide a fast and powerful data visualization framework, using an extremely concise Julia syntax.
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```
## Quick start
The following examples are supposed to be rather self-explaining. See [documentation](https://gcalderone.github.io/Gnuplot.jl/dev/) for further informations.
### A simple parabola
```julia
x = 1.:20
@gp x x.^2 "with lines title 'Parabola'"
save(term="pngcairo size 640,480", output="ex1.png")
save("parabola.gp") # => save a script file with both data and command to re-create the plot.
```
### A slightly more complex plot, with unicode on X tics
```julia
x = -2pi:0.1:2pi
approx = fill(0., length(x));
@gp t="Polynomial approximation of sin(x)" key="opaque"
@gp :- "set encoding utf8" raw"""set xtics ('-π' -pi, 'π/2' -pi/2, 0, 'π/2' pi/2, 'π' pi)"""
@gp :- xr=3.8.*[-1, 1] yr=[-1.5,1.5]
@gp :- x sin.(x) approx .+= x "w filledcurve t 'n=0' lt 1"
@gp :- x sin.(x) approx .+= -x.^3/6 "w filledcurve t 'n=1' lt 2"
@gp :- x sin.(x) approx .+= x.^5/120 "w filledcurve t 'n=2' lt 3"
@gp :- x sin.(x) approx .+= -x.^7/5040 "w filledcurve t 'n=3' lt 4"
@gp :- x sin.(x) "w l t 'sin(x)' lw 2 lc rgb 'black'"
save(term="pngcairo size 640,480", output="ex2.png")
```
### Multiplot: a 2D histogram contour plot and a 3D surface plot
```julia
x = randn(10_000)
y = randn(10_000)
h = hist(x, y, bs1=0.25, nbins2=20)
@gp "set multiplot layout 1,2"
@gp :- 1 key="outside top center box horizontal" "set size ratio -1" h
clines = contourlines(h.bins1, h.bins2, h.counts, cntrparam="levels discrete 10, 30, 60, 90");
for i in 1:length(clines)
@gp :- clines[i].data "w l t '$(clines[i].z)' lw $i lc rgb 'gray'" :-
end
@gsp :- 2 h.bins1 h.bins2 h.counts "w pm3d notit"
save(term="pngcairo size 660,350 fontscale 0.8", output="ex3.png")
```
## Examples
The main gallery of examples is maintained in a separate repository: